2021201222121 has 8 divisors (see below), whose sum is σ = 2994372180960. Its totient is φ = 1347467481396.

The previous prime is 2021201222119. The next prime is 2021201222123. The reversal of 2021201222121 is 1212221021202.

It is a happy number.

2021201222121 is a `hidden beast` number, since 202 + 120 + 1 + 222 + 121 = 666.

It is an interprime number because it is at equal distance from previous prime (2021201222119) and next prime (2021201222123).

It is not a de Polignac number, because 2021201222121 - 2¹ = 2021201222119 is a prime.

It is a super-3 number, since 3×2021201222121³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021201222094 and 2021201222103.

It is not an unprimeable number, because it can be changed into a prime (2021201222123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37429652235 + ... + 37429652288.

It is an arithmetic number, because the mean of its divisors is an integer number (374296522620).

Almost surely, 2^{2021201222121} is an apocalyptic number.

It is an amenable number.

2021201222121 is a deficient number, since it is larger than the sum of its proper divisors (973170958839).

2021201222121 is an equidigital number, since it uses as much as digits as its factorization.

2021201222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74859304532 (or 74859304526 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2021201222121 its reverse (1212221021202), we get a palindrome (3233422243323).

It can be divided in two parts, 202120 and 1222121, that added together give a palindrome (1424241).

The spelling of 2021201222121 in words is "two trillion, twenty-one billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-one".